Demountable tire-rim.



mummufil DEMOUNTABLE TxR'E RIM.

APPLICATION FILED MAH. 3, i917.

Patenmd Jan. 8,1918.

i Wmrej lyggs Leanser...

DEMOUNTABLE 'lRE-RIM.

Specification of Lettersatent.

Patented J an. 8, 1918.

Application filed March 3, 1917. SeralNo. 152,187.

v improvements in demountable rims for automobile wheels, such as are employed to carry a pneumatic tire ready for use.

The object oi the invention is to lprovide a" sectional two vpart demountable tire rim that is made of a pair oitelescopic and interlocking sheet metal members, which when dismounted from the wheel `will greatly facilitate the removal. .or attachment of a tire; to particularly design therim members so that one will be in the form of a closed ring member having a iixed diameter, while the other is open and thus flexible and adapted Ato be contracted to enter the outer member and provided with means or locking the two sections together.

T he device therefore, brieiy comprises an outer unbroken solid ring member having a flange upon one edge and including suitable holding lugs, and an inner open member .also having aY ange upon one edge and cut out at proper points to receive the lugs of the outer'ring member when expanded thereagainst, the two said members being so formed and constructed that when assembled they form a rim, the band portion ot which will include two thicknesses of metal and have an outwardly disposed flange upon both edges suitable to hold a tire therebetween.

In vorder to afford a proper understanding of the invention 1 have illustrated the same upon the accompanying sheet of drawings forming 'apart of this speciication and upon which similar characters of reference will be found to indicate like or corresponding parts throughout the several igures and of which, l

Figure 1 shows a perspective view of the inner expandibleopen'ring member of my improved tire rim.

Fig. 2 is a similar perspective'view of thesolid outer ring member and in which the inner member. shown in Fig. 1, is seated.

Fig. 3 shows a cross section through my improved form of demountable rim having vided lwith holes or pockets 6a.,l

a tire mounted thereon and fitted to a wheel felly and .y

\ Fig. d .is a longitudinal section through a portion of a wheel telly provided with my improved form of demountable rim and a heavy tire mounted thereon.

My invention consists of two specially rolled and formed sheet metal rim members which are designed to take the place of the single demountable rim commonly employed on auto wheels. These two rims as employed by me are much lighter in weight than the common forms of rims above suggested and so that when assembled and applied in use my double form of rim will not be much heavier than the single rims referred to. The outer rim member which is shown in Fig. 2 and designated as vA comprises an annular sheet metal ring member of a uniform diameter and having an outwardly disposed flange 5 formed upon one edge and which in practice serves as a shoulder .against which the inner edge portion of the tire shoe is seated.

Upon the inside of the body-or cylindrical portionof this rim is a series of preferably `four lugs, as it is clearly shown in Fig. 2.

The larger one of these lugs is indicated as 6 and has a round hole 7 formed therethrough to accommodate the valve tube 8 secured to theinner tube 9. The second lug 10 is also locatedv upon the inside and directly opposite to the first mentioned lug 6. Similar, but somewhat shorter lugs 11 and 12 are also arranged upon the inner wall of this rim member as is clearly indicateddin Fig. 2 and as will be noted they are located upon the quarters ot the ring or substantially midway between the before mentioned lugs G'and 10. l.

The inner rim member indicated by B in Fig. 1 vis also formed of sheet metal, but is 'what might be termed an open or broken ring or band adapted to be contracted ande expanded, the end portions 13 being-disposed adjacent to and in alinement with each other, but normally spaced one from the other as is indicated at 14. This' rim member includes straight side walls 15 and a flange. 16, both'said body portion and liange being similar to that of the outer rim member A and proportioned to fit Within and against the said outer rim member. Thisexp'anding open rim member l 1s pro- 1 1l1 and 12a to receive the before mentioned lugs 6, 10, 11 and 12 respectively. The pocket or slot 6a is of substantially the same size as the lug 6 so as to lit the same when the rim member is seated thereagainst. The pockets 11a and 12a are cut somewhat larger and particularly longer than the lugs over which they fit so as to provide for such slight annular movement of theinner rim member within the outer as may be necessary to permit of an adjustment of the one within the other. The same is in a sense true of the pocket 10a formed in the end portion of the inner rim member which allows said portions to be adjusted radially and annularly within the outer rim member and with relation to the lug 10 secured upon the outer rim member. From the foregoing construction it would be apparent that there would be relatively no radial movement of that portion of the inner rim member lying adjacent to the lug 6, but that the movement of the inner rim member when adjusting the same to position would beconfined tothe free end portions.

In lapplying an inflated tire and shoe to my improved form of demountable rim the operator would preferably lay the outer rim section A downfiat upon the door or ground as is suggested by Fig. 2. Then place the inflated tire thereon, care being taken to see that the tube 9y for the valve was properly placed through the hole 7. Then the end portions of the innerl rim member would be drawn together by any suitable means. Theinner rim member is placed within the outer rim in a way to firstl have the pockets 6a positioned over the valve stem and lug thereby bringing the larger pockets 11a and 12a and 10a to 4register with the remaining lugs pro.- jecting inward from the outer rim member.

The moment the pockets of the inner rim member have fitted over the lugs upon the outer rim member the inner rim member wouldbe released and allowed izo/expand so as to secure the parts in position. The tire would 4thus be positioned on the rim ready to be shoved on the wheel rim in the manner indicated in Fig. The outer rim portion incassi is positioned against the inner ange ofthe wheel felly and the wedges 17 are shoved in between the Wheel elly 19 and the inner rim member and against the flange of the latter so as to force it out against the outer rirn memberby the screw bolts 18 when placed in position and which also t up against the iiange of the outer flange of theI inner rim member to rmly hold the parts together.

From the foregoing it will be seen that the ou-ter surface of the outer rim. member, and

upon which the tire is mounted if perfectly y smooth, having no pockets in whine dirt may collect.

A demountable rim of character can be as quickly attached and detached from a wheel as the common forni of'single 'rims and when so detached will permit an old tire being removed and a new tire placed thereon much easier than is the case with the old form of single piece rims having a flange upon both ends.

Having thus described my invention what l claim and desire to secure by Let-ters Patrim member, one of said lugs being formed with a valve receivingopening, said lugs projecting flushwith the inner circumference of the perforated rim member.

vSigned at Bridgeport, in the county of Fairfield and Sate of Connecticut," this'fZSth day of February, A. D. 191'?.

' VARREN R. BRKGGS.

, Witnesses: v

C. M. NEWMAN, y RUTH'M. W. loonn. 

